隔膜对镍氢电池大电流放电性能的影响及特性

通过测试和计算厚度、面密度、吸碱量、吸碱速率、表观密度、隔膜孔隙度及表面SEM形貌特征，对6种镍氢电池隔膜(3种氟化隔膜和3种磺化隔膜)的物理性能进行了综合对比，分析了由这6种隔膜制成的相同正、负极的SC3000镍氢电池在15, 20及30 A下的放电性能；同时结合电池的循环寿命与荷电保持率，筛选出最适于镍氢电池大电流放电的磺化隔膜FV3. 对电池大电流放电时隔膜所应具备的特性进行了概括总结，提出了一种评价隔膜特性对镍氢电池大电流放电性能影响的新方法，对动力型镍氢电池的研究与开发具有重要的参考价值.

Assessment of Separators in High Rate Discharge Performance of Ni-MH Battery

The physical performances of 6 kinds of Ni-MH battery separators (3 kinds of fluorizated separators and 3 kinds of sulfonated separators) were comprehensively compared with each other by measuring and calculating their thickness, surface densities, alkaline absorptions, sucking rates, apparent densities, separator porosities and SEM morphologies. With the help of contrasting charge/discharge curves, cycle lives and charge reservation rates, FV3, a special type of sulfonated separator, was selected as the most suitable diaphragm for 15, 20 and 30 A discharge performances of experimental SC3000 Ni-MH batteries with the same positive and negative electrodes. A new method was also proposed for evaluating the effects of separators on high rate discharge performance, which would be valuable to study and develop dynamical Ni-MH battery.